﻿// Copyright (c) 2012-2013 fancidev
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace Util.IO
{
    public static class BinaryReaderExtensions
    {
        public static void ReadFull(
            this BinaryReader reader, byte[] buffer, int offset, int count)
        {
            if (buffer == null)
                throw new ArgumentNullException("buffer");
            if (offset < 0)
                throw new ArgumentOutOfRangeException("offset");
            if (count < 0 || offset + count > buffer.Length)
                throw new ArgumentOutOfRangeException("count");

            while (count > 0)
            {
                int actual = reader.Read(buffer, offset, count);
                if (actual < 0)
                    throw new ArgumentException("The underlying reader returned a negative byte count.");
                if (actual == 0)
                    throw new EndOfStreamException();
                offset += actual;
                count -= actual;
            }
        }
    }
}
